Very small daughter fighting loudly (5)
I believe the answer is:
dwarf
'very small' is the definition.
(I've seen this before)
'daughter fighting loudly' is the wordplay.
'daughter' becomes 'd' (genealogical abbreviation).
'fighting' becomes 'war'.
'loudly' becomes 'f' (short for forte - 'loud' in music).
'd'+'war'+'f'='DWARF'
(Other definitions for dwarf that I've seen before include "extra in Lord of the Rings?" , "Lilliputian" , "minute?" , "Grumpy, e.g." , "Dopey, perhaps?" .)